A group of Victoria SES and Forest Fire Management Victoria crews left Albury on Monday and Tuesday to help with logistics and rescues during one of the largest flood events the northern state has ever seen.

FFMV Hume deputy chief fire officer Aaron Kennedy said five of his staff will be stationed in Taree and Ballina for the next week.

"Primarily they are there to support the SES, they are the lead agency and we will be doing what we can to support them during this event," he said.

"It is a huge job and we are really appreciative to lend a hand because we have had significant events here in Victoria.

"Particularly back in the 19-20 fires and we had NSW support us, so it is a real privilege to support them during this period.

"We anticipate there will be more requests for assistance following this deployment.

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"Our thoughts are with all the people and emergency services in NSW at the moment, I am sure it is very distressing at this time so again our ability to be able to help them out is really important."

Departing from Albury and Melbourne on Monday, the first group of VICSES members are from Central, North East, North West and Mid-West teams.

Emergency Management Commissioner Andrew Crisp said the State Control Centre is supporting this deployment with planning, resources and logistics.

"Thanks to those who have volunteered already and to their employers who let them go at short notice," he said.

"Such is the scale of what we're seeing in NSW, we expect the request for VICSES field crews will still come. We're preparing how we can help out now, while ensuring we maintain operational capability in Victoria as this rain system heads further south.

"Over this next week there's a low risk in far east of Victoria for riverine flooding, but some potential flash flooding with this higher rainfall. We're prepared for these scenarios."

While the Border and North East haven't seen as much rain as further north, a large dumping of rain fell overnight Monday and into Tuesday.

In the 24 hours to 9am on Tuesday Albury weather station at the Albury Airport recorded 23 millimetres of rain. To 3.30pm Tuesday, another 12.8 millimetres was recorded.

The Bureau of Meteorology is forecasting rain to continue on Wednesday.